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Probability need

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CandaceK
Junior Member

USA
4 Posts

Posted - 09/02/2007 : 22:23:48

Question:
A computer Consulting firm presently has bids out on three projects.
Let Ai = {awarded project i}, for i = 1,2,3, and suppose that
P(A1)=.22, P(A2)=.25,P(A3)=.28
P(A1

A2)=.11 P(A1

A3)=.05
P(A2

A3)=.07 P(A1

A3)=.01

1)A1

A2=.36
2)A1'

A2'=(A1

A2)' =.64
3)A1

A3=.22+.25+.28-.11-.05-.07+.01 =.53
4)A1'

A2'

A3'= .47
5)A1'

A2'

A3 = ?
6)A1'

A2'

A3 =?

royhaas
Moderator

USA
3044 Posts

Posted - 09/03/2007 : 14:57:32

5) (A1'

A2'

A3)'=A1

A3'
6) First complete 5), then use the rule for (A1'

A2')

A3.

CandaceK
Junior Member

USA
4 Posts

Posted - 09/03/2007 : 17:47:47

quote:
Originally posted by royhaas

5) (A1'A2'A3)'=A1A2A3'
6) First complete 5), then use the rule for (A1'A2')A3.

How did you get (A1'

A2'

A3)' from A1'

A2'

A3?

royhaas
Moderator

USA
3044 Posts

Posted - 09/04/2007 : 17:23:32

Look at 5) again; then look at what I wrote. It's the complement of 5), which you should be able to compute from the givens.

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